DESCEIPTIONS OF PLATES. 289 



PLATE VII. 



ILLUSTRATIVE OF A PAPER, BY RICHARD GRIFFITH, LL. D., Etc., ON 

 THE SUBDIVISIONS OF THE CARBONIFEROUS SYSTEM. 



Section 1 is across the Lugnaquilla, Cuilgagh, and Slieve Bushen moun- 

 tains, to Bosskeeragh, near Butler's Bridge, in the county of 

 Cavan, showing the relative positions of the several members of 

 the Carboniferous system in Ireland. 



Section 2 is through the Yellow Sandstone district, north of Lough 

 Erne, exhibiting a complete sequence of the several members of 

 that group of rocks, succeeded conformably by the Lower Lime- 

 stone and Calp series. 



Section 3, from the lower Silurian strata at Lisbellaw, to the same series 

 of rocks near Scot's House in Monaghan, showing the order of 

 succession of the Carboniferous system, from the Yellow Sand- 

 stone base at either extremity to the Calp and Calp Sandstone of 

 the Slievebeagh district. 



Section 4, from the Culm beds near LochiUin, the Munster Coal 

 district, to Shannon Grove, near Pallaskenry, in the county of 

 Limerick, showing the relative positions of the several members 

 of the Carboniferous system in the south of Ireland. 



Vide page 135. 



